Remove trailing whitespace

Author: tcharding

src/sha1.rs

@@ -108,7 +108,7 @@ impl HashTrait for Hash {
         let pad_length = zeroes.len() - (e.length % BLOCK_SIZE);
         e.input(&zeroes[..pad_length]);
         debug_assert_eq!(e.length % BLOCK_SIZE, zeroes.len());
-        
+
         e.input(&util::u64_to_array_be(8 * data_len));
         debug_assert_eq!(e.length % BLOCK_SIZE, 0);